NEGATIVE ELECTRODE POLE PIECE, LITHIUM-ION BATTERY AND APPARATUS

Title:

NEGATIVE ELECTRODE POLE PIECE, LITHIUM-ION BATTERY AND APPARATUS

Document Type and Number:

WIPO Patent Application WO/2021/027743

Kind Code:

A1

Abstract:

A negative electrode pole piece, a lithium-ion battery and an apparatus. The negative electrode pole piece comprises a negative electrode current collector, a negative electrode active material layer that is disposed on at least one surface of the negative electrode current collector and that comprises a negative electrode active material, and a lithium-replenishing layer that is disposed on the surface of the negative electrode active material layer away from the current collector. The lithium-replenishing layer comprises a lithium-replenishing region and a gap region, and the lithium-replenishing region and the gap region are sequentially interconnected. The described negative electrode pole piece effectively ameliorates the problem of pole piece heating, and channels formed by the lithium-replenishing region and the gap region may enable an electrolyte in the lithium-ion battery to more effectively saturate the negative electrode pole piece after injection, thus improving the energy density of the battery while also improving the service life and kinetic performance of the battery.

Inventors:

CHEN SHITONG (CN)
XIE BIN (CN)
HU ZHAO (CN)
GONG ZHIJIE (CN)
LI WEN (CN)
MA LIN (CN)

Application Number:

PCT/CN2020/107939

Publication Date:

February 18, 2021

Filing Date:

August 07, 2020

Export Citation:

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Assignee:

CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)

International Classes:

H01M4/13

Foreign References:

CN109786662A	2019-05-21
CN108847474A	2018-11-20
CN206992216U	2018-02-09
CN109004234A	2018-12-14
US20150000118A1	2015-01-01
CN201910744408A	2019-08-13

Other References: